Broadband piezoelectric vibration energy collection system

Abstract

The invention discloses a broadband piezoelectric vibration energy collection system. The system comprises a frequency collection circuit, a voltage stabilizing push-pull circuit and an operational amplifier circuit. The frequency collection circuit collects the frequency of the electric power signal collected by a broadband piezoelectric vibration energy collection system, the voltage stabilizingpush-pull circuit uses a frequency modulation circuit composed of a triode Q1, a capacitor C2 and a capacitor C4 to stabilize the signal frequency, simultaneously uses an operational amplifier AR1 and an operational amplifier AR2 to form a feedback voltage stabilizing circuit for voltage stabilization, and finally uses a triode Q4 to a triode Q7 to form the push-pull circuit to prevent the signalfrom crossover distortion; and the operational amplifier circuit uses an operational amplifier AR3 to perform in-phase amplification of the signal and simultaneously filters the signal by employing aRC filtering circuit composed of a resistor R20, a resistor R21, a capacitor C8 and a capacitor C9 to send the signal to the remote control terminal of the broadband piezoelectric vibration energy collection system through an emitter E1 so as to collect the electric energy power signal frequency collected by the broadband piezoelectric vibration energy collection system in real time, perform automatic calibration of the signal and prevent the data signal from distortion.

Description

technical field

[0001] The invention relates to the field of circuit technology, in particular to a broadband piezoelectric vibration energy collection system. Background technique

[0002] Piezoelectric vibration energy harvesting technology is based on the positive piezoelectric effect of piezoelectric materials to convert vibration energy into electrical energy. When subjected to an external force in a fixed direction, the piezoelectric material deforms and generates electrical polarization inside. When the external force is removed, the piezoelectric material regenerates. Return to normal, so the mechanical energy is converted into electrical energy. However, at this time, the electrical energy is used by electronic equipment after passing through the transformer and voltage stabilizer. The safe use of electricity by equipment requires real-time monitoring of electric energy. At the same time, the monitoring signal cannot be disturbed by electric and strong magnetic fiel...

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